package com.xinruke.hostels.support.common;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component
public class ApplicationContextHelper implements ApplicationContextAware {
    private static ApplicationContext applicationContext;

    public ApplicationContextHelper() {
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        ApplicationContextHelper.applicationContext = applicationContext;
    }

    //通过name获取 Bean
    public static Object getBean(String beanName) {
        return applicationContext != null?applicationContext.getBean(beanName):null;
    }

    //通过class获取Bean
    public static <T> T getBean(Class<T> clazz){
        return applicationContext != null? applicationContext.getBean(clazz): null;
    }
}